The passage is from Marilynne Robinson, a Pulitzer Prize-winning novelist:
"The ancients are right: The dear old human experience is a singular, difficult, shadowed, brilliant experience that does not resolve into being comfortable in the world. The valley of the shadow is part of that, and you are depriving yourself if you do not experience what humankind has experienced, including doubt and sorrow. We experience pain and difficulty as failure instead of saying, I will pass through this, everyone I ever admired has passed through this, music has come out of it, literature has come out of it. We should think of our humanity as a privilege."